CN214583432U

CN214583432U - Wedge-type flowmeter capable of being cleaned on line

Info

Publication number: CN214583432U
Application number: CN202121114972.5U
Authority: CN
Inventors: 王月声
Original assignee: Beijing Fischer Porter Technology Development Co ltd
Current assignee: Beijing Fischer Porter Technology Development Co ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-11-02
Anticipated expiration: 2031-05-24

Abstract

The utility model discloses a but online cleaning's wedge flowmeter, survey buret including the flowmeter, survey buret both ends and be provided with the flange that inserts the person in charge, be provided with the wedge body in the middle of surveying buret axial, be provided with respectively on the survey buret at wedge body both ends and get and press the pipe, there is the flange apron in the exit linkage who gets and press the pipe, the lower terminal surface of flange apron is provided with gets and presses the diaphragm, be provided with one at the flange apron and get and press and sweep the ring cover between the pipe export, stretch into from sweeping ring cover lateral wall and be provided with a steam and sweep the pipe, steam sweeps the pipe and is provided with the nozzle that sweeps on the lateral wall of pressing the diaphragm center to getting, a steam source sweeps union coupling with steam, sweep and be provided with between the steam inlet at steam source and steam and manage. The online cleaning is realized by arranging the purging pipe below the pressure-taking diaphragm, the pressure-taking diaphragm does not need to be taken down for cleaning, and the hidden trouble that the measurement precision is reduced due to incorrect installation of the pressure-taking diaphragm is avoided, so that the structure is simple and reliable; convenient operation and high production efficiency.

Description

Wedge-type flowmeter capable of being cleaned on line

Technical Field

The utility model relates to a but on-line cleaning's wedge flowmeter is a but on-line cleaning gets wedge flowmeter of pressure diaphragm.

Background

The wedge-type flowmeter is a meter suitable for low Reynolds number fluid flow measurement, and is particularly more remarkable in measuring high-viscosity fluid, solid particle-containing fluid and slurry. In the using process, the fact that high-viscosity fluid, fluid containing solid particles and serous fluid are measured is found, a double-flange differential pressure transmitter is generally used for collecting differential pressure signals, a medium is only in contact with a pressure taking diaphragm of a sensor, then the pressure signals are transmitted to the transmitter for processing through a capillary filled with silicon oil, after the flowmeter operates for a period of time, certain medium dirt or medium crystallization can be attached to the pressure taking diaphragm of the sensor, the dirt can cause the differential pressure value measured by the transmitter to be abnormal, and therefore the flowmeter is inaccurate in measurement and needs to be stopped and cut off for cleaning. Some producers have the stop valve in the pressure of getting to press to get to press to have with the sensor and get to press between the diaphragm, during the washing, only need close the stop valve, just can get to press the diaphragm with the sensor and dismantle and wash, though need not to stop, cut off, this kind of washing mode still wastes time and energy, and has the hidden danger that the measurement accuracy that gets to press the diaphragm installation and just arouses descends.

Disclosure of Invention

An object of the utility model is to provide a but online cleaning's wedge flowmeter is a but online cleaning gets wedge flowmeter of pressing the diaphragm, can ensure the long-time reliable operation of flowmeter, simultaneously also greatly reduced the maintenance input of manpower, material resources.

In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides a but online cleaning's wedge type flowmeter, surveys buret including the flowmeter and surveys buret, surveys buret both ends and is provided with the flange that inserts the person in charge, is provided with the wedge body in the middle of surveying buret axial, is provided with respectively on the survey buret at wedge body both ends and gets and press the pipe, has the flange apron in the exit linkage who gets and press the pipe, and the lower terminal surface of flange apron is provided with and gets the pressure membrane piece, sets up central thru hole on the flange apron, and the pressure signal line that two flange apron lower terminal surfaces got the pressure membrane piece is worn out from central hole and is connected pressure differential transmitter, wherein: a purging ring sleeve is arranged between the flange cover plate and the pressure tapping pipe outlet, a steam purging pipe extends into the side wall of the purging ring sleeve, a purging nozzle is arranged on the side wall of the steam purging pipe facing the center of the pressure tapping membrane, a steam source is connected with the steam purging pipe, and a purging control valve is arranged between the steam source and the steam inlet of the steam purging pipe.

The scheme is further as follows: the measuring pipe shaft and the pressure tapping pipe are sleeved with heat-insulating pipe sleeves, and heat-insulating clearance interlayers are arranged between the heat-insulating pipe sleeves and the measuring pipe shaft as well as between the heat-insulating pipe sleeves and the pressure tapping pipe.

The scheme is further as follows: a heating steam inlet connecting pipe and a heating steam outlet connecting pipe which are communicated with the clearance interlayer are arranged on the heat insulation pipe sleeve, and an air inlet valve and an air outlet valve are respectively arranged on the heating steam inlet connecting pipe and the heating steam outlet connecting pipe.

The scheme is further as follows: the steam purging pipe extends into the steam purging pipe perpendicular to the side wall of the purging ring sleeve, and a capillary drain hole with the diameter smaller than that of the purging nozzle is formed in the side wall of the steam purging pipe at the lower end of the purging nozzle.

The scheme is further as follows: the steam purging pipe is inclined to the side wall of the purging ring sleeve in elevation angle and extends into the side wall of the purging ring sleeve, a steam water storage tank is connected and arranged on the steam purging pipe on the side of the control valve, and a discharge port and a discharge valve are arranged on the storage tank.

The scheme is further as follows: the distance between the purging nozzle and the pressure taking diaphragm is 10-15 mm, and the purging nozzle is a bell-mouth nozzle with a diameter larger outside and smaller inside.

The utility model has the advantages of it is following: the online cleaning is realized by arranging the purging pipe below the pressure-taking diaphragm, the pressure-taking diaphragm does not need to be taken down for cleaning, the hidden trouble of measurement precision reduction caused by incorrect installation of the pressure-taking diaphragm is avoided, the long-time reliable operation of the flowmeter can be ensured, meanwhile, the maintenance investment of manpower and material resources is greatly reduced, and the structure is simple and reliable; convenient operation and high production efficiency.

The present invention will be described in detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is the internal relationship structure diagram of the steam purging pipe and the pressure tapping pipe of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples. The described embodiments are only some, but not all embodiments of the invention. In the description of the present embodiment, it should be noted that the terms "connected" and "disposed" should be interpreted broadly, for example, the "connection" may be a wire connection or a mechanical connection; the 'placing' can be fixedly connected placing or integrally formed placing. The specific meanings of the above terms in the present embodiment can be understood by those of ordinary skill in the art according to specific situations. It should be noted that various aspects will be described, each of which can be used alone or in combination. That is, any given aspect may be used in different embodiments unless explicitly indicated as a mere substitution. Furthermore, in the following, for the sake of simplicity, always an item is generally mentioned. However, unless explicitly mentioned, the present embodiment may also include many specific items. Thus, use of the terms "a" and "an" should be taken to mean that at least one item is used in a single embodiment.

A wedge-type flowmeter capable of being cleaned on line is taken as a traditional wedge-type flowmeter and is shown in figures 1 and 2, the wedge-type flowmeter comprises a flowmeter measuring pipe 1, flanges 2 connected with a main pipe are arranged at two ends of the measuring pipe, a wedge body 3 is arranged in the axial middle of the measuring pipe, the wedge body is welded at the axial center of the top end of the inner wall of the measuring pipe and is positioned at the top end of the outer wall of the measuring pipe at the same side with the wedge body, pressure taking pipes 4 are respectively arranged on the measuring pipe at two ends of the wedge body and are symmetrically distributed by taking the radial center of the wedge body as a reference, the pressure taking pipes are communicated with the measuring pipe, one end of each pressure taking pipe is welded on the outer wall of the measuring pipe, the other end of each pressure taking pipe is provided with a connecting flange cover plate 6, the flange cover plate is fixedly connected with the connecting flange 6 at the outlet of each pressure taking pipe, a pressure taking membrane 7 is arranged on the lower end surface of the flange cover plate 5, a central through hole is arranged on the flange cover plate, and pressure signal wires 8 of the pressure sampling membranes on the lower end faces of the two flange cover plates penetrate out of the central hole and are connected with a pressure difference transmitter 9, and pressure difference data on two sides of the wedge body 3 can be read from the pressure difference transmitter. In this embodiment: a sweeping ring sleeve 10 is arranged between the flange cover plate and the pressure tapping pipe outlet, a steam sweeping pipe 11 extends into the sweeping ring sleeve from the side wall of the sweeping ring sleeve, the front end of the extending steam sweeping pipe is blocked, a sweeping nozzle 1101 is arranged on the side wall of the extending steam sweeping pipe facing the center of the pressure tapping membrane, in order to obtain a good sweeping effect, the distance between the sweeping nozzle and the pressure tapping membrane is 10-15 mm, and the shape of the sweeping nozzle is a bell-mouth nozzle with an outer opening diameter of 5-7 mm and an outer large and an inner small; a steam source is connected with the steam purging pipe, and a purging control valve 12 is arranged between the steam source and a steam inlet of the steam purging pipe. Wherein: the two flange cover plates 5 with the pressure-taking diaphragms 7 arranged on the lower end faces, the pressure signal line 8 and the differential pressure transmitter 9 are combined to form a double-flange differential pressure transmitter which is a standard product, wherein the pressure signal line 8 is a capillary tube filled with silicon oil, the pressure in the measuring tube directly contacts with the pressure-taking diaphragms 7, and then the pressure is transmitted to the differential pressure transmitter 9 through the silicon oil for detection and calculation.

For the measurement to be accurate: the measuring pipe shaft and the pressure tapping pipe are sleeved with heat-insulating pipe sleeves 13, and heat-insulating gap interlayers 14 are arranged between the heat-insulating pipe sleeves and the measuring pipe shaft and the pressure tapping pipe.

The intermediate layer can fill insulation material, and what this embodiment adopted is that hot steam heats and keeps warm: therefore, as shown in fig. 1, a heating steam inlet connecting pipe 15 and a heating steam outlet connecting pipe 16 which are communicated with the gap interlayer are arranged on the heat-insulating pipe sleeve, and an air inlet valve 17 and an air outlet valve 18 are respectively arranged on the heating steam inlet connecting pipe and the heating steam outlet connecting pipe.

In order to solve the drainage problem after steam cooling: the steam purging pipe extends into the steam purging pipe perpendicular to the side wall of the purging ring sleeve, and a capillary drain hole 19 with the diameter smaller than that of the purging nozzle is formed in the side wall of the steam purging pipe at the lower end of the purging nozzle. The cooling water flowing out of the capillary drain holes drips into the measuring tube. The blowing steam is sprayed onto the pressure taking diaphragm along the blowing opening, dirt or crystals on the pressure taking diaphragm are dissolved and fall off under high temperature, and condensed water generated by the blowing steam is discharged into the measuring pipe through a water discharging hole 19 arranged right below the blind end of the blowing rod.

Of course, the steam purging pipe can be inclined at an angle of 3-5 degrees to the side wall of the purging ring sleeve and extend into the side wall of the purging ring sleeve, so that the generated steam cooling water can flow back, a steam water backflow storage tank (not shown in the figure) is connected and arranged on the steam purging pipe on the side of the control valve, and a discharge port and a discharge valve are arranged on the storage tank and are periodically discharged to solve the problem of the steam cooling water.

The above embodiment: the online cleaning is realized by arranging the purging pipe below the pressure-taking diaphragm, the pressure-taking diaphragm does not need to be taken down for cleaning, the hidden trouble of measurement precision reduction caused by incorrect installation of the pressure-taking diaphragm is avoided, the long-time reliable operation of the flowmeter can be ensured, meanwhile, the maintenance investment of manpower and material resources is greatly reduced, and the structure is simple and reliable; convenient operation and high production efficiency.

Claims

1. A wedge-type flowmeter capable of being cleaned on line comprises a flowmeter measuring tube, flanges connected to a main tube are arranged at two ends of the measuring tube, a wedge body is arranged in the axial middle of the measuring tube, pressure sampling tubes are respectively arranged on the measuring tubes at the two ends of the wedge body, the outlet of the pressure sampling pipe is connected with a flange cover plate, the lower end surface of the flange cover plate is provided with a pressure sampling membrane, the flange cover plate is provided with a central through hole, the pressure signal wires of the pressure sampling membranes on the lower end surfaces of the two flange cover plates penetrate out of the central hole and are connected with a differential pressure transmitter, the steam pressure measuring device is characterized in that a purging ring sleeve is arranged between the flange cover plate and the pressure measuring pipe outlet, a steam purging pipe extends into the side wall of the purging ring sleeve, a purging nozzle is arranged on the side wall of the steam purging pipe facing the center of the pressure measuring diaphragm, a steam source is connected with the steam purging pipe, and a purging control valve is arranged between the steam source and the steam inlet of the steam purging pipe.

2. The wedge flowmeter of claim 1, wherein a thermal insulation sleeve is sleeved around the measurement pipe shaft and the pressure tapping pipe, and a thermal insulation gap interlayer is arranged between the thermal insulation sleeve and the measurement pipe shaft and the pressure tapping pipe.

3. The wedge-type flowmeter of claim 2, wherein the heat-preserving jacket is provided with a heating steam inlet connecting pipe and a heating steam outlet connecting pipe which are communicated with the gap interlayer, and the heating steam inlet connecting pipe and the heating steam outlet connecting pipe are respectively provided with an inlet valve and an outlet valve.

4. The wedge flowmeter as recited in claim 1, wherein the steam purge tube extends perpendicularly to the side wall of the purge collar, and a drain hole having a diameter smaller than that of the purge nozzle is formed in the side wall of the steam purge tube at the lower end of the purge nozzle.

5. The wedge flowmeter as set forth in claim 1, wherein said steam purge pipe is inserted obliquely to the side wall of the purge collar at an elevation angle, a steam water storage tank is connected to the steam purge pipe on the control valve side, and a drain port and a drain valve are provided to the storage tank.

6. The wedge flow meter of claim 1, wherein said purge nozzle is a bell mouth nozzle with a diameter of large outside and small inside, and is a distance of 10 to 15mm from said pressure pick-up diaphragm.